Some linux distributions, like FREESCO, do not include sendmail in their base installation. Other folks may not want to install the exim package. Either way, if you want to use PHP's mail() function and you do not have a mail server installed locally, you need to find another way for mail() to sucessfully send email from a PHP script. In that case this may be the solution for you!

I've compiled mini_sendmail that you can install on your FREESCO like so: